Nano tungsten oxide is not only a kind of infrared ultraviolet shielding material, but also a very important member of photocatalysts. Tungsten oxide exhibits very good photocatalytic activity, which is similar to the most classic photocatalyst - titanium dioxide (Ti4+). So, what is a photocatalyst? Photocatalyst refers to a general term for a chemical substance that can act as a catalyst under the excitation of photons.
Titanium dioxide, particularly in the anatase form, exhibits photocatalytic activity under ultraviolet (UV) irradiation. This photoactivity is reportedly most pronounced at the {001} planes of anatase, although the {101} planes are thermodynamically more stable and thus more prominent in most synthesized and natural anatase, as evident by the often observed tetragonal dipyramidal growth habit.
Recently, researchers have classified the already synthesized photocatalysts, which is mainly based on the differences in electronic configurations. They found that photocatalysts with d0- or d10-electron configurations exhibited very good photocatalytic activity, such as TiO2. Like TiO2, tungsten oxide also has a d0-electron configuration (W6+).
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